-tames m



(No Model.)

J. M. HOLLAND. ROAD GRADER IlNiTnn STATES ATENT rricn..

JAMES M. HOLLAND, OF MOUNT PLEASANT, IOVA, ASSIGNOR TO THE MOUXT PLIASANT ROAD GRADER COMPANY, OF SAME PLACE.

RoAn-GRADER.

SPECIFICATION forming part of Letters Patent No. 555,095, dated February25, 1896.

Application filed January 5,1894. Serial No. 495,772. (No model.)

To all whom, t may concern:

Be it known that I, JAMES M. HOLLAND, a citizen of the United States,and a resident of Mount Pleasant, in t-he county of lIenry and State ofIowa, have invented certain new and useful Improvements in Road-Graders, of which the following is a specification.

The object of my invention is to provide improved means for laterallymoving the scraper or scraper-supporting mechanism of a road-grader, themeans so employed being instantaneous in operation, a secure lock whenthe scraper is stationary, and of a powerful character, as is desirablein shifting the said scraper against the resistance of a bank or load ofdirt.

)ly invention consists in the combination, with a scraper or themechanism supporting the same, of a worm-gear adapted for manualoperation and connection between the said worm-gear and the said scraperor supporting mechanism.

My invention consists further in the construction, arrangement, andcombination of parts hereinafter set forth, pointed out in my claim, andillustrated by the accompanying drawings, in which- Figure 1 is asectional elevation of the rear portion of the machine. Fig. 2 is a planview of the machine.

In the construction of the device as shown the numeral designates theforward trucks, 11 the rear trucks, and 12 the main frame mounted uponand supported by said trucks.

A scraper-bar 13 is located between the trucks, and is provided with aneye-block ll on its forward end, adapted for connection with the forwardtruck, 10, by means of a clevis 15. The eye-block 1I is provided with aneye 16 having its greatest dimension transversely of the scraper-bar,and a latch 17 is hinged to one side of said eye-block and is adapted tobe raised and lowered relative thereto. The latch 1T is notched at theedge thereof adjacent to the forward side of the eye-block, in any oneof which notches the clevis is adapted to be retained, thus determiningthe relative position of the eyeblock to the forward truck.

A scraper-blade 18 is suspended from the scraper-bar, the detailedconstruction of the said scraper-blade and its connections with thescraper-bar being described andvillustrated in Letters Patent of theUnited States, No. 4Sl,et29, issued to me October 1S, 1892,

The rear end of the scraper-bar 13 terminates in a ruddertongue 19, onwhich is mounted a ring 20. The ring 2O forms a connection between theadjacent ends of chains 21 22, which latter extend in oppositedirections directly across the main frame 12 and at right anglesthereto. and are driven through pulleys 23 24, respectively. The chains21 22 extend rearwardly relative to the machine from the pulleys 23 21to points 'of attachment to drums 25 26, respectively, which drums aremounted on opposite ends of a rotatable shaft 27, mounted transverselyof and in the rear end portion of the main frame. The drums 25 26 arespirally grooved with counterpart spirals, and the connection of thecha-in ends therewith is such that the chains wind thereon in oppositedirections relative to each other in order that in the rotation ofthedrums the slack chain produced by the unwinding from one drum will beimmediately taken up by the accumulation of chain upon the remainingdrum, resulting in a consequent lateral movement of the ring 2O andtongue 10 corresponding with the length of chain unwound from one drum.

A pinion 2S is rigidly secured upon the shaft 27 adjacent to one of thedrums, which pinion meshes with and is acted upon by a worm 29 formed ona shaft 30 vertically positioned in a bracket 3l attached to the rearend of the main frame. The shaft 30 is surinounted by a crank-wheel 32,adapted for manual actuation to rotate said shaft.

It will be observed that by the employment of the worm-gear and theconnections between said worm-gear and the scraper-blade asensitively-operating powerful leverage is obtained, whereby thescraper-blade may be instantly easily operated, regardless of load orendwise resista-nce, to take more land from a bank, or to discharge theearth outside the track of the truck-wheels, or to avoid an obstructionwhich would otherwise damage the machine or necessitate the backing ofthe entire machine to obviate.

The pulleys 2f 2l are respectively mounted IOC) upon and rotate aboutstandards 33 3l, which standards are inclined inwardly and rearwardly tocompensate for the variation of strain upon the chains occasioned by therise and fall of the scraper-bar when shifted into different horizontalplanes, as described in the aforementioned patent.

Slight variation in the position of the scraper-bar relative to a givenhorizontal plane is compensated for by the automatic shifting of thetongue 19 within the ring` 20.

Having; thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent of the United States therefor, is-

ln a road-grader the combination of a scraper-bar, a scraper-bladesuspended from said bar, a rotatable shaft located in proximity to saidbar, drums located on said shaft and provided with spiral grooves,chains connected to said drums and adapted to be oppositelywound thereonrelative to each other, a ring' connecting the adjacent ends of saidchains and connected with said scraper-bar, pulleys supporting andguiding the bight of said chains, and a manually-operated wormgearconnected with and adapted to act upon said shaft, whereby the saidscraper-blade may be swung laterally by the manipulation of theworm-gear.

In testimony whereof I have hereunto set my hand in the presence of twowitnesses. JAMES M. HOLLAND. In presence of H. H. CARTER, \V. S.WITHROW.

